Most bikes on trainers have aNT+ sensors. Combine that with a USB stick that reads this info (like the one that comes with most garmin HRMs) and you could use the actual pedaling cadence or speed sensotr to controll the pace of playback. Also for imported gpx routes, it would be nice to see the route on the upper right map.

Sometimes I found riding switchbacks difficult on RealIndoor because of the way the camera would orient itself in the corners.
(e.g. you might find yourself staring a rock wall)
Not a huge deal, but maybe there is a better way to handle the route projection, camera orientation.

I'd would be great if the Biking Information window was resizable, so we could see all the data at a bigger size to be more aware of the slopes that are coming ;)
By the way, the height profile graphic has a bug, and can be dragged outside the window.
I also suggest you, to separate the height graphic to a separated window, in order to be able to see the biking parameters (speed, watts...) and the height profile, at the same time.
Congratulations for the job done, it's very useful!

This is exactly what I've been googling for!!
Great Tool!!!
Please add some arrows to show you which direction in the street view we'll be turning on when we get to a turn/new street/road/intersection.
Thanks!